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remove the generation of grammar from the reference
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configure

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@@ -624,7 +624,6 @@ probe CFG_LD ld
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probe CFG_VALGRIND valgrind
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probe CFG_PERF perf
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probe CFG_ISCC iscc
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probe CFG_LLNEXTGEN LLnextgen
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probe CFG_JAVAC javac
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probe CFG_ANTLR4 antlr4
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probe CFG_GRUN grun

mk/docs.mk

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@@ -246,26 +246,6 @@ endef
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$(foreach lang,$(L10N_LANGS),$(eval $(call DEF_L10N_DOC,$(lang),guide)))
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######################################################################
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# LLnextgen (grammar analysis from refman)
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######################################################################
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ifeq ($(CFG_LLNEXTGEN),)
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$(info cfg: no llnextgen found, omitting grammar-verification)
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else
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.PHONY: verify-grammar
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doc/rust.g: $(D)/rust.md $(S)src/etc/extract_grammar.py
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@$(call E, extract_grammar: $@)
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$(Q)$(CFG_PYTHON) $(S)src/etc/extract_grammar.py $< >$@
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verify-grammar: doc/rust.g
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@$(call E, LLnextgen: $<)
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$(Q)$(CFG_LLNEXTGEN) --generate-lexer-wrapper=no $< >$@
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$(Q)rm -f doc/rust.c doc/rust.h
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endif
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######################################################################
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# Rustdoc (libstd/extra)
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######################################################################

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